....See another explanation about ssb rigs in my homepage before you read this page! I will explain about the differences from the another machines.
*This machine is constructed by 5 valves on a board . See photo! You can touch the case , because the case is separated electrically from the circuit board. See the (A) point of the circuit! The ground of a microphone is separated by the transformer. (A) point is case ground and another are circuit ground. It is same as (B) and (C) point.

*30MP23 is equivalent valve as 30A5.
*You must choose the very low current type for the relays.
*Output of this machine is 2W.
*T1-T7:FB801,trifiler,3 turn.
*T8:FB801,bifirer,7 turn.
*(A),(B),(C) points are case ground. Another are print board.
*T9,T10:10mm core bobbin,0.2EC,12t:4t.
*T11-T13:10K type bobbin,0.2EC,10t:3t.
*I made the QSO with Shimonoseki with this machine from Ibaraki.

http://www.intio.or.jp/jf10zl/5vssb.htm